Len Pasquarelli, of ESPN.com, reports Kansas City Chiefs OG Will Shields has decided to retire after 14 seasons in the NFL. The 12-time Pro Bowl performer and likely Hall of Fame candidate announced his retirement on his Web site. "The love for the game never decreased but, as the years passed, the physical requirements of the game became harder to fulfill each and every day. If it was up to me I would play football forever but, as we all know, that is unrealistic," Shields wrote on the site.